Earlier this year Firefox announced that they would start blocking cookies from third-party ad networks by default.

Firefox and cookiesThe update to the FireFox browser will allow sites that you’ve visited (first parties) to set cookies on your system, but it will block cookies from third parties, such as advertising networks, unless they already have a cookie on your machine.

Originally scheduled to take effect in Firefox 22, which will be released in June 2013, the change has been delayed, but it’s still something that affiliate marketers need to keep an eye on.

Click the link above to read the rest. And below is a link to the WebGains post.

You may be aware that Firefox 22, that is due for release in June 2013, was planning to block third party cookies by default. Third party cookies are those set by a different domain to the one that the user is visiting at the time and have a range of applications including including analytics solutions.